Spa



FIG. 1 is a perspective view of the spa wall;

FIG. 2 is a side elevational view thereof as seen from the right hand side of FIG. 1;

FIG. 3 is a front elevational view thereof with a rear elevational view thereof being a substantial mirror image;

FIG. 4 is a side elevational view seen from the left hand side of FIG. 1; and,

FIG. 5 is a top plan view thereof.

The bottom view does not form a portion of the design. The material shown in dash dot lines is used for purposes of illustrating environment and does not form a portion of the present design. 

The ornamental design for a spa, as shown and described. 